María Ronco

Bialgebras in the category of S modules.


The category S-Mod of S-modules has three different monoidal structures. We study different notions of bialgebras in this context, beginning with the definition of twisted bialgebra of F. Patras and C. Reutenauer. We analize the relationship between these structures, as well as some classical Hopf algebras obtained from them, and the methods to compute their primitive elements.